Every Classic Rimfire scope incorporates many of the exact same features found on Weaver's top-of-the-line models. Designed to bring out the best in rimfire and adult air rifles, the Classic Rimfire comes in variable and fixed power modelswith fully multi-coated, non-glare lenses that produce edge-sharp, low -light brightness, even in the duskiest of conditions. All scopes feature rugged, aircraft-grade, one-piece aluminum construction. Waterproof, fogproof and shockproof, the Classic Rimfire is designed to withstand the multi-directional recoil from the heaviest spring-loaded adult airguns. Parallax is set at 50 yards for ideal rimfire target acquisition and accuracy.